Water tank for humidifier



FIG. 1 is a perspective view of a water tank for humidifier, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dashed dot lines immediately adjacent to the shaded areas in the figures represent the boundaries of the claimed design. The dashed lines in the figures illustrate the portions of the design that form no part of the claimed design. None of the broken lines form any part of the claimed design. 

CLAIM We claim the ornamental design for a water tank for humidifier, as shown and described. 